Elevator brake



G JNES ELVATOR BRAKE May s, 1923. 1,454,745

Filed Feb. l5, 1922 2 Sheets-Sheet l #ww/5555 j gn/WM www? Mmmm ava/ws 4. v, h g?, W.

May 8, 1923.

1,454,745 A. G. JANES l-zLEvmoR BRAKE Filed Feb. l5l 1922 2 Sheets-Sheet 24 Patented May 8, i923.

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Application filed February 15, 1922.

To all 10.720722, t may conce/m:

Be it known that l,- ARCHIBALD G. Janus, citizen of the TJnited States, residing at Fitzgerald7 in the county of Ben Hill and State of Georgia, have invented certain new and useful improvements in an Elevator Brake, of which the following is a specification.

This invention relates to an elevator brake and has for its principal object to provide means whereby an elevator may be quickly and efficiently stopped should it become uncontrollable by the ordinary means.

Another object of the invention is to provide an elevator brake which will act as a safety device being' capable of being actuated at a convenient'point within the elevator and necessitating only a minimum amount of exertion to actuate the same.

A still further object of the invention is to generally improve upon elevator brakes of this nature by providing a device which will be extremely simple and efficient in construction, reliable in operation, and well adapted to the purpose for which it is designed.

lVith the above and numerous other ob- `iects in view as will appear as the description progresses, the invention resides in certain novel features of construction and in the combination and arrangement of parts as will be herein after more fully described and claimed.

In the drawing:

Figure l is an elevation of an elevator showing my invention attached to the top thereof, a portion of the side wall ofthe elevatorl being broken away to show the interior thereof,

Figure 2 isa top plan of the mechanism shown in Figure l, and

Figure 3 is a vertical section taken substantially on the line 3-3 of Figure 2.

Referring to the drawing in detail it will be seen that the elevator l may be of any conventional construction and is provided with the usual guide receiving members 2 that embrace the guides 3. This elevator may be raised and lowered in any desired manner and no mechanism for this purpose has been illustrated since it does not form a part of this invention.

|The brake mechanism has been illustrated as mounted on the top of the elevator but itis to be understood that it may be mounted on the bottom thereof or in any other con- `of the actuating cranks .25.

sei-iai no. 536,533'.

veulent manner. ln the present illustration lparallel with the sides of the elevatorv l having the guide receiving members 2 thereon. rFliese shafts and brackets are arranged in close proximity tothe sides of the elevator. n. bar 6 is positioned so as to span the distance between the rock shaft 4 and is provided with journals 7 at its ends for receiving the shaft. lThe intermediate portion of the rod 6 is supportedy on a bracket 8 byr means vof a clamp member. 9 fixed to the 'top thereof. Another bracket l0 is situ ated between the shafts l in alignment with the bracket so that the shaft ll may be journaled in the brackets 8 and l0. This shaft il extends through the bracket l0 and is provided on this end with a worm gear The shafts thus far mentioned are all horizontally disposed. A vertically disposed shaft le is journaled in a bracket 15 carried interiorly of the elevator l and mounted preferably on the front wall thereof. rlhis shaft 14 entends through the top of the elevator in the present example and is provided at its end with a worm 16 in mesh with the worm gear rlhe lower end of the shaft le: is provided with a beveled gear 19 that` eshes with a beveled gear 20 which is fixed to' an operating wheel 2l suitably journaled as at 22. The shaft la forms the main drive shaft and the shaft 1l forms the auxiliary drive shaft. This auxiliary drive shaft 1l is provided with a pair of spool. members 23 in which are trained the chains 24 that are adapted to be wound therein. The driven rock shafts -l are each provided with an actuating crank 253 and an actuated crank 26. The chains 2st are attached to the terminals The actuated cranks 26 are provided with suitable brake shoes 27 adapted to be brought into frictional engagement withthe guides 3. It Will be noted that the present, illustration of the invention shows the actuating cranks depending from. the rock shafts 4 while the actuated cranks 26 extend upwardly therefrom. rllhe chains 24 are so disposed about the spools 23 as to pull the chains and frotate the actuating cranks toward each other or toward the center of the elevator thereby actuating the actuated cranks A26 away from the elevator 'and pushing the brake shoes 27 in frictional engagement with the guides 3. v It Will also be'understood that this is accomplished by rotation of the operating wheel 22 transmitting its rotation through the gear 20, gear 19, drive sha-ft 14, worm 16, worm gear 13, auxiliary drive shaft 11, to the spools and so as previously indicated.

Although have described my invention with some degree ot particularity it is to be understood that this has only been done by way oli' example and that many changes in forni, proportion, and in the arrangement and combination of parts may be resorted to without departing` from the spirit ot' this invention.

Having thus described my invention what I claim as new is l 1. In combination, an elevator, a pair of rock shafts mounted on the elevator, actuating and actuated cranks extendingr from the rock shafts, brake shoes carried by the actuated cranks, chains carried by the actuating cranks, an auxiliary drive shaft journaled on the elevator, spools on the auxiliary drive shaft over which said chains are trained, a worin gear keyed to said auxiliary drive shaft, a driven shaft suitably journalcd on the elevator' so as to extend therethrough and terminate interiorly thereof, andA means within the elevator for rotating said drive shaft.

2. In combination, an clevator, a pair or rock shafts journaled on the elevator, acmatingY cranks and actuated. cranks extending from the rock shafts, a rod spanning tl e distance between said shafts intermediate their ends and provided with journals at its ends Jfor receiving said shafts, brake shoes carried by the actuated cranks, and means for operating` the actuating cranks.

in testimony whereof I ailix my si gnature in presence of two witnesses.

ARCHBALD Gr. JANES,

lVitnesses J. M. SMITH, J. l?. REDMOND. 

